<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>列表过滤</title>
    <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
    <!-- 准备好一个容器 -->
    <div id="root">
        <!-- 遍历数组 -->
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyWord">
        <ul>
            <!-- <li v-for="p in persons" :key="p.id">
                {{p.name}}-{{p.age}}
            </li> -->
            <li v-for="(p,index) in filPersons" :key="index">
                {{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul>
    </div>

    <script type="text/javascript">
        Vue.config.productionTip = false //阻止 vue 在启动时生成生产提示。
        
        // 用watch实现
        /* new Vue({
            el:'#root',
            data:{
                keyWord:'',
                persons:[
                    {id:'001',name:'马冬梅',age:18,sex:'女'},
                    {id:'002',name:'周冬雨',age:19,sex:'女'},
                    {id:'003',name:'周杰伦',age:20,sex:'男'},
                    {id:'004',name:'温兆伦',age:21,sex:'男'}
                ],
                filPersons:[]
            },
            watch:{
                keyWord:{
                    immediate:true,
                    handler(val){
                        this.filPersons = this.persons.filter((p)=>{
                            return p.name.indexOf(val) !== -1
                        })
                    }
                }
            }
        }) */
        
        // 用computed实现
        new Vue({
            el:'#root',
            data:{
                keyWord:'',
                persons:[
                    {id:'001',name:'马冬梅',age:18,sex:'女'},
                    {id:'002',name:'周冬雨',age:19,sex:'女'},
                    {id:'003',name:'周杰伦',age:20,sex:'男'},
                    {id:'004',name:'温兆伦',age:21,sex:'男'}
                ],
            },
            computed:{
                filPersons(){
                    return this.persons.filter((p)=>{
                        return p.name.indexOf(this.keyWord) !== -1
                    })
                }
            }
        })
    </script>
</body>
</html>